1. Heat half a tbsp oil in a non-stick wok add the chopped tomatoes, tamarind, salt, chilli powder and turmeric powder cover with a vented lid and cook till completely done.Remove lid and allow the water to evaporate.

2. Allow it to cool, once cooled transfer into a blender and blend it into a fine paste.

3. In a pan heat one tbsp oil and splutter cumin seeds, mustard seeds, chana dal, urad dal and curry leaves saute for about a minute and add asafoetida.Now add the tomato mixture to this and combine well for about 2 minutes.